Thanks for sharing this JWS. Locally we are going to start a newcomers meeting and we have a planning meeting scheduled to determine the format for that meeting. I intend to read your original post in that meeting if the opportunity arises.
I also find myself with limited tolerance recently for those who speak down from the mountaintops to those who they view as the lesser mortals below. That said, I have also found myself pointing out likely pitfalls to newcomers.
I take pains to not come off as speaking down to anyone. I think it's essential to find a way to address the likely pitfalls a newcomer faces but at the same time not alienate that person. The manner in which these ideas are communicated are every bit as important as the content of the message.
I think you are in a powerful position as a newcomer if you are able to find the words to cultivate a bit more thoughtfulness in those who clearly are deficient in it.